BBC presenter and writer Dallas Campbell said people often forget there was more than one moon landing.

“We went to the moon nine times from 1968 to 72, it wasn’t just a onetime thing,” he said.

“Also, 400,000 people worked on Apollo. I’m always amazed by the faith that conspiracy theories have in being able to do that and keep it a secret.”

Reasons for thinking the moon landings were staged include the idea that the US faked the whole thing to beat Russia in the space race.

One theory suggests that footage shows the flag Buzz Aldrin placed on the moon was flying - suggesting that wind was blowing.

But Dallas Campbell said the custom-made flag actually had a metal pole across the top to make it look like it’s flying.

“He’s moving the flag - things still move in a vacuum if you touch them,” he said.

He added: “This is one of our greatest achievements as a species - of galactic significance. This was a point in history where we actually went to another planetary body. That’s pretty big and was a rare thing.